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Dr Dmitrii Kolotkov


Position: Postdoctoral Research Fellow

Supervisor: Professor Valery Nakariakov

Research interests: solar physics; heliospheric physics; MHD seismology; nonlinear waves and oscillations; coronal, magnetospheric, and astrophysical plasmas

Funding: STFC Consolidated grant



Background

PhD in Physics, CFSA, University of Warwick, UK, 2017

PhD thesis: Nonlinear and multi-modal oscillatory processes in active regions of the solar atmosphere

MSc in Electophysics, Sarov Institute for Physics and Technology National Research Nuclear Institute "MEPhI", Russia, 2013

MSc thesis: Supernonlinear waves in plasma

BSc in Applied Mathematics and Physics, Sarov Institute for Physics and Technology National Research Nuclear Institute "MEPhI", Russia, 2011

BSs thesis: Nonlinear ion-acoustic waves in a quantum degenerate warm plasma with dust grains


Research Description

My current research interests are mainly focused on the spectral analysis and analytical low-dimensional modelling of nonlinear, non-stationary, and multi-modal oscillatory processes in active regions of the solar atmosphere. In particular, my recent studies are related to the analysis of quasi-periodic processes in solar flares, Earth-size plasma faculae and pores oscillating at the surface of the Sun, oscillatory processes in coronal mass ejections (CMEs); theory of nonlinear oscillations in coronal current sheets and quisecent prominences.

In the past, I have studied theoretical aspects of nonlinear waves propagating in multi-fluid plasmas. Waves of different physical nature, such as Langmuir, dust- and ion-acoustic, Alfven, were considered. As a result, new types of highly nonlinear oscillations in plasma were discovered: super-nonlinear periodic and solitary (supersolitons) waves, both characterised by a non-trivial topology of their phase portraits, highly anharmonic profile shapes, extremely long periods and high amplitudes.


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CFSA, PS1.22

D dot Kolotkov at warwick dot ac dot uk

+44 7425 813431